the front side of Mairsil, the Pretender
the back of a classic MtG card
the front side of Sage of Hours
the back of a classic MtG card
the front side of Anthroplasm
the back of a classic MtG card

Color Identity: U, B, R

Initial Card State

  1.  Mairsil on the battlefield.
  2.  Sage of Hours and Anthroplasm in exile.

Notable Prerequisites

  1. Mairsil does not have summoning sickness.

Mana Needed

  1. five generic mana each turn available.

Steps

  1. Activate Mairsil using Anthroplasm's ability by paying five generic mana and tapping it, removing all +1/+1 counters and putting five +1/+1 counters on Mairsil.
  2. Activate Mairsil using Sage of Hours's ability by removing five +1/+1 counters, gaining an extra turn after this one.
  3. Move to your next turn.
  4. Repeat.

Results

  1. Infinite turns.
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